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Finding the Fourth Proportional to 70,815.87, 106,226.74 and 20,895.97

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Solution

The fourth proportional to 70,815.87, 106,226.74 and 20,895.97 is: 31,344.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,815.87 : 106,226.74 = 20,895.97 : x
  2. Step 2: Convert to fraction form
    70,815.87/106,226.74 = 20,895.97/x
  3. Step 3: Cross multiply
    70,815.87x = 106,226.74 × 20,895.97
  4. Step 4: Simplify right side
    70,815.87x = 2,219,710,136.62
  5. Step 5: Solve for x
    x = 2,219,710,136.62/70,815.87
  6. Step 6: Final answer
    x = 31,344.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.